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Application of Life-Dependent Material Parameters to Fatigue Life Prediction under Multiaxial and Non-Zero Mean Loading.

ABSTRACT: This study presents the life-dependent material parameters concept as applied to several well-known fatigue models for the purpose of life prediction under multiaxial and non-zero mean loading. The necessity of replacing the fixed material parameters with life-dependent parameters is demonstrated. The aim of the research here is verification of the life-dependent material parameters concept when applied to multiaxial fatigue loading with non-zero mean stress. The verification is performed with new experimental fatigue test results on a 7075-T651 aluminium alloy and S355 steel subjected to multiaxial cyclic bending and torsion loading under stress ratios equal to R = -0.5 and 0.0, respectively. The received results exhibit the significant effect of the non-zero mean value of shear stress on the fatigue life of S355 steel. The prediction of fatigue life was improved when using the life-dependent material parameters compared to the fixed material parameters.

SUBMITTER: Kluger K

PROVIDER: S-EPMC7178182 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Application of Life-Dependent Material Parameters to Fatigue Life Prediction under Multiaxial and Non-Zero Mean Loading.

Kluger Krzysztof K Karolczuk Aleksander A Derda Szymon S

Materials (Basel, Switzerland) 20200330 7

This study presents the life-dependent material parameters concept as applied to several well-known fatigue models for the purpose of life prediction under multiaxial and non-zero mean loading. The necessity of replacing the fixed material parameters with life-dependent parameters is demonstrated. The aim of the research here is verification of the life-dependent material parameters concept when applied to multiaxial fatigue loading with non-zero mean stress. The verification is performed with n ...[more]

PMID: 32235605

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Project description:The experimental data in this submission is related to parts of the dissertation "Bruchkurvenmodellierung von kohlenstofffaserverstärkten Kunststoffen bei mehrachsig nichtproportionaler Ermüdungsbeanspruchung" [1] and partly to further publications on the fatigue of carbon fibre-reinforced plastic [2]. The background to the experimental investigations is the need to better understand the behavior of fiber-reinforced plastics under various multiaxial loads. For this purpose, comprehensive tests ranging from uniaxial tests on unidirectional up to multiaxial tests on multidirectional specimens are conducted. The details in this paper include the preparation of specimens, the chemical compositions, the stresses based on each single specimen's geometry and the test settings of the cyclic experiments. In this article, the experimental data for failure and number of endured cycles under uni- and proportional multiaxial loads are explained in detail, while additionally, all the raw experimental data on the hysteresis loops can be found in the Mendeley Data repository [3]. The dataset can therefore be used for their own validations and analysis, and it allows the reader to trace back all the settings made during the tests. The manufacturing of the carbon fibre-reinforced tube specimen by filament winding is carried out at the Institute of Polymer Materials and Plastics Engineering of the Clausthal University of Technology and the cyclic tension- or compression-torsion tests are conducted on a servo-hydraulic testing machine at the Institute of Automotive Engineering (IFK) of TH Köln - University of Applied Sciences. Radially wound quasi-unidirectional tube test specimens with the layer structure [±90], balanced angle-ply laminates with the layer structure [±70] and multidirectional laminates with the layer structure [90/±70] were used. The investigated material system consists of carbon fiber-reinforced plastic with a thermoset epoxy resin as the matrix material.

Dataset Information

Application of Life-Dependent Material Parameters to Fatigue Life Prediction under Multiaxial and Non-Zero Mean Loading.

Publications

Application of Life-Dependent Material Parameters to Fatigue Life Prediction under Multiaxial and Non-Zero Mean Loading.

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